US9007880B2 - Thermally assisted magnetic recording medium and magnetic recording and reproducing apparatus - Google Patents

Thermally assisted magnetic recording medium and magnetic recording and reproducing apparatus Download PDF

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Publication number
US9007880B2
US9007880B2 US14/385,840 US201314385840A US9007880B2 US 9007880 B2 US9007880 B2 US 9007880B2 US 201314385840 A US201314385840 A US 201314385840A US 9007880 B2 US9007880 B2 US 9007880B2
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United States
Prior art keywords
underlayer
magnetic recording
recording medium
magnetic
thermally assisted
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US14/385,840
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English (en)
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US20150049594A1 (en
Inventor
Tetsuya Kanbe
Kazuya Niwa
Yuji Murakami
Lei Zhang
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Resonac Corp
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Showa Denko KK
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Assigned to SHOWA DENKO K.K. reassignment SHOWA DENKO K.K. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANBE, TETSUYA, MURAKAMI, YUJI, NIWA, KAZUYA, ZHANG, LEI
Publication of US20150049594A1 publication Critical patent/US20150049594A1/en
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Assigned to RESONAC CORPORATION reassignment RESONAC CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SHOWA DENKO K.K.
Assigned to RESONAC CORPORATION reassignment RESONAC CORPORATION CHANGE OF ADDRESS Assignors: RESONAC CORPORATION
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62Record carriers characterised by the selection of the material
    • G11B5/73Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/7368Non-polymeric layer under the lowermost magnetic recording layer
    • G11B5/7369Two or more non-magnetic underlayers, e.g. seed layers or barrier layers
    • G11B5/737Physical structure of underlayer, e.g. texture
    • G11B5/738
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/09Digital recording
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/4866Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives the arm comprising an optical waveguide, e.g. for thermally-assisted recording
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62Record carriers characterised by the selection of the material
    • G11B5/64Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/65Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/657Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing inorganic, non-oxide compound of Si, N, P, B, H or C, e.g. in metal alloy or compound
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62Record carriers characterised by the selection of the material
    • G11B5/64Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/65Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/658Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing oxygen, e.g. molecular oxygen or magnetic oxide
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B2005/0002Special dispositions or recording techniques
    • G11B2005/0005Arrangements, methods or circuits
    • G11B2005/0021Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005Specially adapted for spacing from a rotating disc using a fluid cushion
    • G11B5/6088Optical waveguide in or on flying head
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/74Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/82Disk carriers
US14/385,840 2012-05-01 2013-04-30 Thermally assisted magnetic recording medium and magnetic recording and reproducing apparatus Active US9007880B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2012-104566 2012-05-01
JP2012104566A JP5961439B2 (ja) 2012-05-01 2012-05-01 熱アシスト磁気記録媒体及び磁気記録再生装置
PCT/JP2013/062609 WO2013165002A1 (ja) 2012-05-01 2013-04-30 熱アシスト磁気記録媒体及び磁気記録再生装置

Publications (2)

Publication Number Publication Date
US20150049594A1 US20150049594A1 (en) 2015-02-19
US9007880B2 true US9007880B2 (en) 2015-04-14

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US14/385,840 Active US9007880B2 (en) 2012-05-01 2013-04-30 Thermally assisted magnetic recording medium and magnetic recording and reproducing apparatus

Country Status (4)

Country Link
US (1) US9007880B2 (zh)
JP (1) JP5961439B2 (zh)
CN (1) CN104303232B (zh)
WO (1) WO2013165002A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9899594B2 (en) 2015-09-23 2018-02-20 Samsung Electronics Co., Ltd. Magnetic memory devices

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9934797B2 (en) * 2016-04-26 2018-04-03 Tdk Corporation Multilayer element including base multilayer body, magnetic sensor and microwave assisted magnetic head
JP7122175B2 (ja) * 2018-06-25 2022-08-19 昭和電工株式会社 熱アシスト磁気記録媒体および磁気記憶装置
JP7244721B2 (ja) * 2019-04-09 2023-03-23 株式会社レゾナック 磁気記録媒体および磁気記憶装置
JP7258275B2 (ja) * 2019-05-09 2023-04-17 株式会社レゾナック 磁気記録媒体および磁気記録再生装置

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06259743A (ja) 1993-03-10 1994-09-16 Hitachi Ltd 磁気記録媒体及び磁気記録装置
JPH11353648A (ja) 1998-06-10 1999-12-24 Akita Prefecture 規則合金薄膜からなる情報記録媒体の製造方法
JP2002025032A (ja) 2000-06-30 2002-01-25 Sony Corp 磁気記録媒体
JP2002208129A (ja) 2000-11-09 2002-07-26 Hitachi Maxell Ltd 磁気記録媒体及びその製造方法並びに磁気記録装置
JP2004178753A (ja) 2002-11-28 2004-06-24 Toshiba Corp 垂直磁気記録媒体
US6916530B2 (en) * 2001-10-24 2005-07-12 Toda Kogyo Corporation Perpendicular magnetic recording medium
JP2009146558A (ja) 2007-12-14 2009-07-02 Samsung Electronics Co Ltd 磁気薄膜構造体、磁気記録媒体及びその製造方法
JP2009158054A (ja) 2007-12-27 2009-07-16 Hitachi Global Storage Technologies Netherlands Bv 垂直磁気記録媒体及びその製造方法
US7829208B2 (en) 2007-11-29 2010-11-09 Seagate Technology Llc Chromium nitride layer for magnetic recording medium
JP2011198455A (ja) 2010-02-23 2011-10-06 Showa Denko Kk 熱アシスト磁気記録媒体及び磁気記憶装置
JP2012014750A (ja) 2010-06-29 2012-01-19 Showa Denko Kk 熱アシスト磁気記録媒体及び磁気記憶装置
JP2012160243A (ja) 2011-02-02 2012-08-23 Showa Denko Kk 熱アシスト磁気記録媒体及び磁気記憶装置
JP2012169017A (ja) 2011-02-15 2012-09-06 Showa Denko Kk 熱アシスト磁気記録媒体及び磁気記憶装置
JP2012221544A (ja) 2011-04-14 2012-11-12 Showa Denko Kk 熱アシスト磁気記録媒体、及び磁気記録再生装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1395726A (zh) * 2000-01-13 2003-02-05 日立麦克赛尔株式会社 磁记录介质,磁记录介质的制造方法,以及磁记录装置
US20090147401A1 (en) * 2006-05-08 2009-06-11 Migaku Takahashi Magnetic recording medium, method of manufacturing the same, and magnetic recording/reproducing apparatus
JP5137087B2 (ja) * 2006-09-08 2013-02-06 エイジェンシー フォア サイエンス テクノロジー アンド リサーチ L1o規則垂直記録媒体の製造方法
CN102473420B (zh) * 2009-08-20 2015-01-07 昭和电工株式会社 热辅助磁记录介质和磁存储装置

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06259743A (ja) 1993-03-10 1994-09-16 Hitachi Ltd 磁気記録媒体及び磁気記録装置
JPH11353648A (ja) 1998-06-10 1999-12-24 Akita Prefecture 規則合金薄膜からなる情報記録媒体の製造方法
JP2002025032A (ja) 2000-06-30 2002-01-25 Sony Corp 磁気記録媒体
JP2002208129A (ja) 2000-11-09 2002-07-26 Hitachi Maxell Ltd 磁気記録媒体及びその製造方法並びに磁気記録装置
US6916530B2 (en) * 2001-10-24 2005-07-12 Toda Kogyo Corporation Perpendicular magnetic recording medium
JP2004178753A (ja) 2002-11-28 2004-06-24 Toshiba Corp 垂直磁気記録媒体
US7829208B2 (en) 2007-11-29 2010-11-09 Seagate Technology Llc Chromium nitride layer for magnetic recording medium
JP2009146558A (ja) 2007-12-14 2009-07-02 Samsung Electronics Co Ltd 磁気薄膜構造体、磁気記録媒体及びその製造方法
JP2009158054A (ja) 2007-12-27 2009-07-16 Hitachi Global Storage Technologies Netherlands Bv 垂直磁気記録媒体及びその製造方法
JP2011198455A (ja) 2010-02-23 2011-10-06 Showa Denko Kk 熱アシスト磁気記録媒体及び磁気記憶装置
JP2012014750A (ja) 2010-06-29 2012-01-19 Showa Denko Kk 熱アシスト磁気記録媒体及び磁気記憶装置
JP2012160243A (ja) 2011-02-02 2012-08-23 Showa Denko Kk 熱アシスト磁気記録媒体及び磁気記憶装置
JP2012169017A (ja) 2011-02-15 2012-09-06 Showa Denko Kk 熱アシスト磁気記録媒体及び磁気記憶装置
JP2012221544A (ja) 2011-04-14 2012-11-12 Showa Denko Kk 熱アシスト磁気記録媒体、及び磁気記録再生装置

Non-Patent Citations (2)

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Title
Ikuya Tagawa, et al., "Relationship Between High Density Recording Performance and Particle Coercivity Distribution", IEEE Transactions on Magnetics, Nov. 1991, pp. 4975-4977, vol. 27, No. 6.
International Search Report of PCT/JP2013/062609, dated Jul. 16, 2013. [PCT/ISA/210].

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9899594B2 (en) 2015-09-23 2018-02-20 Samsung Electronics Co., Ltd. Magnetic memory devices

Also Published As

Publication number Publication date
WO2013165002A1 (ja) 2013-11-07
CN104303232A (zh) 2015-01-21
JP5961439B2 (ja) 2016-08-02
US20150049594A1 (en) 2015-02-19
CN104303232B (zh) 2017-11-28
JP2013232266A (ja) 2013-11-14

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